package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);

        //新增成功后，清除redis中缓存,只清理当前分类下关联的菜品数据
        String key = "dish_" + dishDto.getCategoryName() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {

        //分页构造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();
        //条件构造器
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        lqw.like(name != null, Dish::getName, name);
        lqw.orderByAsc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo, lqw);
        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {

            DishDto dishDto = new DishDto();
            //对象拷贝,将属性都拷贝到自己定义的DishDto中
            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);//通过id查询到对应的分类对象
            if (category != null) {
                String categoryName = category.getName();
                //设置分类名
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        //设置新的records
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);

        //修改成功后，需要清理redis中缓存
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);

        return R.success("修改菜品成功");
    }

    /**
     * 查询菜品
     *
     * @param dish
     * @return
     */
    @GetMapping("/list")
    /*public R<List<Dish>> list(Dish dish){

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId,dish.getCategoryId());
        //查询status为1的,表示起售状态
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序规则
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);
        return R.success(list);
    }*/
    public R<List<DishDto>> list(Dish dish) {

        List<DishDto> dishDtoList = null;
        //拼接字符串key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
        //先尝试从redis中获取数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        //能获取到
        if (dishDtoList != null) {
            return R.success(dishDtoList);
        }


        //redis中获取不到数据，则去访问mysql


        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //查询status为1的,表示起售状态
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序规则
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);

            //根据菜品id，查询得到口味数据
            Long id = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, id);
            List<DishFlavor> flavors = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(flavors);
            return dishDto;
        }).collect(Collectors.toList());


        //mysql查询到数据，存入redis中
        redisTemplate.opsForValue().set(key, dishDtoList, 1, TimeUnit.HOURS);

        return R.success(dishDtoList);
    }


    /**
     * 批量删除菜品信息
     *
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> deleteByIds(@RequestParam List<Long> ids) {
        //删除菜品基本信息,根据集合ids删除
        dishService.removeByIds(ids);
        //删除菜品口味信息
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(DishFlavor::getDishId, ids);
        return R.success("删除成功");
    }

    /**
     * 起售,停售,顺便批量
     *
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> status(@PathVariable int status, @RequestParam List<Long> ids) {
        log.info("接受到的参数  ids: {} , status : {}", ids, status);
        //添加status条件
        LambdaUpdateWrapper<Dish> updateWrapper = new LambdaUpdateWrapper<>();
        updateWrapper.in(Dish::getId, ids);
        updateWrapper.set(Dish::getStatus, status);
        dishService.update(updateWrapper);
        return R.success("操作成功");
    }


}
